منابع مشابه
Harvest and Post-harvest Operations
Harvest and post-harvest operations constitute principal constraints to rice production, especially in irrigated systems, because of the larger yield that has to be handled. Post-harvest crop losses of up to 35% have been reported and attributed to inefficiency of manual threshing of rice by small-scale farmers. This leads to poor grain quality and rejection of locally produced rice. The Africa...
متن کاملSong-type matching between neighbouring song sparrows.
In our study population, neighbouring song sparrows typically share two or more of their 6-10 song types. In an earlier experiment, we found that established neighbours typically reply to playback of neighbour-shared song with a different song they share with that neighbour ('repertoire matching'), rather than with the same song ('type matching') or with a nonshared song. In the present experim...
متن کاملLate song learning in song sparrows
In many oscine species, young males learn songs that match those of their first breeding-season neighbours. Because sharing songs with neighbours may be advantageous, selection should favour birds that retain the capacity to memorize new songs later in their first year as the birds cannot know for sure who their neighbours will be until spring. We investigated whether song sparrows, Melospiza m...
متن کاملNode harvest
When choosing a suitable technique for regression and classification with multivariate predictor variables, one is often faced with a tradeoff between interpretability and high predictive accuracy. To give a classical example, classification and regression trees are easy to understand and interpret. Tree ensembles like Random Forests provide usually more accurate predictions. Yet tree ensembles...
متن کاملOctonion Song
The Octonions and their multiplication table, the Fano Plane, bear an isomorphic relationship to the Pythagorean music system, which this paper shows is not a coincidence. In fact, the Octonions vibrate at one stage during the formation of new particles, in what might be termed the Octonion Song. This explains why Octonion structure matches musical structure. This paper explains how this happen...
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ژورنال
عنوان ژورنال: The Course of Study
سال: 1900
ISSN: 1545-5890
DOI: 10.1086/452722